Middlings purifier



(No Mo deLy 3 SheetsSheet 1. J. M. CASE. 4

MIDDLINGS PURIPIBR.

No. 310,181. Patented Jan. 6,1885.

p LNWEIJTOB (N 0 Mmdel.) 3 SheetsSheet 2.

J. M. CASE.

MIDDLINGS PURIFIER. No. 810,181. Patented Jan. 6, 1885.

F'IGJII- FIGJV;

N} E ST- "UNITED STATES 'JOHN M. CASE, OF COLUMBUS, OHIO,

ASSIGNOR TO THE CASE IWIANUFAG TUBING COMPANY, OF SAME PLACE.

MIDDLINGS-PURIFIERI SPECIFICATION forming part of Letters Patent No. 310,181, dated January 6, 1885.

Application filed April 17, 1884. (No model.)

To all whom it may concern.-

Be it known that I, JOHN M. CASE, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio,have invented certain new and useful Improvements in MiddlingsPurifiers, of which the following is a specification.

My invention relates to that class of machines designed for separating the impure matter from the middlings; and in Order that it may be fully understood I will describe it with reference to the drawings which accompany and form part of this specification.

Figure I represents a side elevation of my improved niiddlingspurifier. In this illustration I have shown but two independent machines mounted one above the other, but

there may be three or more, all operated in connection with one another. Fig. II is a vertical transverse section of the same mill'on the line II II, Fig. I. Fig. III is an under side view of the riddle. Fig. IV is a vertical longitudinal section thereof. Fig. V is a. vertical transverse section of the feed-box. Fig. VI is a plan view of the discharge-spout. Fig. VII is a plan of the cloth-cleaning frame. Fig. VIII is an end elevation thereof. Fig. IX is a detail view of the riddle-operating mechanism. 7

As stated, I prefer to mount two or more riddles, 1, within the same frame, as shown in Figs. I and II, said riddles being adapted to tail off independently or successively, as desired. The riddles are supported by hangers in any customary manner, and are operated, preferably, by means of belt 2, fixed at its ends to the tail of each riddle, passing over anti-friction rollers 2, and provided with a central strap or yoke, 3, surrounding eccentriceton driving-shaft 5. A walking-beam or rocker, 6, is pivoted at its center on the opposite end of the frame, and has its ends fixed to the heads of the respective riddles in such manner that by the operation of the eccentric the riddles are thrown in opposite directions, thus by their isochronous action counterbalancing one another and avoiding violent shaking of the machine. Theresult of this arrangement is that bracing in the mill is largely dispensed with and the machine runs noiselessly without jar or undue friction.

i The walking-beam 6 is pivoted upon bolt 7, having tightening-nut 8, by which means slack in the belt 2 or looseness in the connections can be taken up at will. 9 in the beam allows the free oscillation of the same board upon its pivot, and a second nut, 10, retains it thereon. On the same drivingshaft 5 is placed aworm, l1, gearing in worm- The conical aperture wheel 12 on the rotary shaft 13, which has bearing in the brackets 14: on the frame of the machine, and is provided at its opposite extremity with crank 15, working in slot 16 in the lower end of a second walking-beam, 17,

connected by links 18 to the cleaning-frame 19. The cleaning-frame is provided with a number of wires, 20, stretched from end to end-of the frame, and passing at one enda round roller 21, in such mapnenthaethewires may be tightened to'thedegree necessary to cause them to perform the work properly.

The principle of cleaning the cloth in the present purifier is not that of brushing, and

its action is decidedly more efficient.

IVhen the machine is in operation, the rid- 7 dles being vibrated up to a rapid speed, (ordinarily about one thousand reciprocations per minute,) the wires 20 are caused to tremble or vibrate against the cloth in such a manner as to produce a light whipping action, which,

while not severe enough to produce any injury to the cloth, is sufficient to cause the material flowing over the cloth to be kept in a constant state of boiling agitation, whereby the fibrous material isall caused to be submitted to air- 8 currents passing through the cloth, and is easily drawn away. The trembling motion of the wires also acts to keep the meshes of the cloth entirely free at all times. It will be seen that the tendency of this cleaner is not only to 0 remove the material from the under side of the cloth, but by its slight-whipping action, before referred to, to dislodge any light material which may be attached to the upper surface of the cloth, so as to permit it to be car- 9 ried away by air-currents. The suction of air up through the cloth, caused by the fan 22, acts to lift the cloth by pressure on the under side, thus increasing its vibratory motionupon the wires in such a manner as to assist very materially in the thorough cleaning of the cloth.

In the illustration here shown the cleaningframe is shown extending on both the upper and lower sides of the cloth, the two parts being connected by yokes 23; but the frame may be arranged on the lower side only, or in any manner desired.

The feed-box, illustrated in Figs. III, IV,

. and V, consists of a hopper or tube, 24, from which inclined spouts 25 conduct to the two sides of the feed-box proper, 26, so that material flowing into the hopper is divided and sent to each end of the box, and thus evenly fed onto both sides of the riddle. Plates 27, of tin or other sheet metal, fixed within the trough or hopper 24, are capable of adjustment by set-screws 28, to direct the material as desired into the spouts 25. The material is thus thoroughly leveled and allowed to pass over the front edge of the feedbox in a uniform manner and with even flow, requiring no attention whatever on the part of the miller, but being perfectly automatic at all times.

I may or may not employ notched bridges 29, pivoted at .their centers 29, so that by changing their position the material may be leveled and a perfectly even flow effected.

The conveyer-spout 30 below the riddle is provided with an adjustable sliding valve, 31, arranged in the manner shown in my former Patent No. 239,029, for regulating the amount of material it may be at any time necessary to pass back as returns, or be conducted to a second riddle. Inclined slats 32 aid in feeding the material into th conveyer-trough.

The following is claimed as new in the abovedescribed invention:

1. In a middlings-purifier, the combination, with the bolt constructed of bolting-cloth, of a reciprocating frame placed below said bolt, and provided with tightly-stretched wires or cords vibrating in contact with the under side of the cloth, as explained.

2. Inamiddlings-purifier, the bolt anda reciprocating frame placed below it, and having wires or cords tightly stretched thereon, in combination with a fan for producing a current of air past said cords, whereby they are vibrated, as explained.

3. In a middlings-purifier, the bolt and a reciprocating frame having tightly stretched wires or cords placed beneath said bolt, in combination with a fan placed above the bolt for producing a current ofair upward past said cords and through said bolt, as and for the purposes set forth.

4. In a middlings-purifier, the combination,

with a reciprocating frame having boltingcloth stretched thereon, of a reciprocating frame having wires or cords tightly stretched shaft 5, the central strap or yoke, 3, the belts 2, the anti-friction bearings 2, the riddles 1,

and the walking-beam 6.

-7. Ina middlings-purifier, the combination of a riddle, a cleaning device consisting of tightly-stretched wires or cords arranged in proximity to the under side thereof, and a fan for vibrating said cords, as explained.

8. In a middlings-purifier, the combination, with the vibrating riddle, of a feeding device carried thereby, consisting of a hopper-spout having deflectors therein, branch spouts for conducting the material therefrom, and a box a into which said material empties, as explained.

9. In a middlings-purifier, the combination, with a reciprocating riddle, of a feed-box carried thereby, and extending completely across the same, whereby an equal and uniform quantity of material is fed to said riddle from side to side, as explained.

l 10. The combination,- with the feed-hopper 24: and delivery-spouts 25, branching therefrom, of the adjustable deflectors 26, located in said hopper, as and for the purposes set forth.

11. The combination with the riddles 1, the straps 2, connecting them, and meansfor impartinga reciprocating motion to saidstraps, of the walking-beam 6, connected to said riddles at its respective ends, and having an adjustable fulcrum, as and for the purpose set forth.

12. The combination, with the cleaningframes 19 19 and walking-beam 17, connected thereto at its respective ends, of the crankshaft 13, driving-shaft 5, and gearing-mechanism, substantially as and for the purpose set forth;

13. In a middlingspurifier, the combination, with a riddle, of a reciprocating framev placed below it, and provided with tightlystretehed wires or cords vibrating in contact with the under side thereof, as and for the purpose set forth. JOHN M. CASE.

Witnesses:

J AMES Warson, W. T. McOLURE. 

